JPS5924539A - Manufacture of hollow bearing material having oil groove by continuous casting - Google Patents

Abstract

PURPOSE:To manufacture continuously a hollow bearing material having an oil groove simply and inexpensively by providing claws projecting to the inside of the cavity on the outer mold or core of a mold for continuous casting, and drawing the billet having hardened surface while rotating it in the circumferential direction. CONSTITUTION:A mold 3 for continuous casting consisting of an outer mold 1 having a gate 8 and a core 2 attached thereto to arrest relative rotation is mounted to the bottom of a furnace 4 to arrest the relative rotation. One or more claws 13 projecting to the inside of the cavity are formed on the small diameter part of the core 2. Molten metal 16 is sent into the cavity of the mold 3 from the gate 8. A hollow bearing material 17 having an oil groove is grasped by a chuck 15 while jetting cooling water from nozzles 14 thereunder, and drawn while oscillating and rotating by a specified angle in the circumferential direction. Then, a nearly 8-shaped oil groove 18 can be formed on the inner peripheral face. When it is drawn while rotating in one direction in the circumferential direction, the oil groove 18 is formed spirally. When the said calws 13 are provided on the outer mold 1 side, the oil groove 18 is formed on the outer peripheral face of the material 17.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a hollow bearing material with oil grooves by continuous casting.

Conventionally, in order to manufacture a hollow bearing material with oil grooves, a hollow pipe material without oil grooves was manufactured by continuous casting, and the hollow pipe material was cut to a predetermined length and then processed with oil grooves. For this reason, the cost for mass production was 1piHa+. Therefore, recently, attempts have been made to manufacture a hollow bearing material with oil grooves using a continuous casting mold as shown in FIGS. 1 to 4. This method uses a continuous casting mold 3 in which a cavity is formed by an outer mold 1 and a core 2, and a claw is protruded into the cavity from the outer mold 1 or the core 2. A hollow bearing material with oil grooves in the axial direction is continuously produced by pouring molten metal, cooling it in the mold, and pulling it out after at least the surface has solidified. However, in this conventional manufacturing method for hollow bearing materials, since the solidified metal is simply pulled out in the axial direction from the continuous casting mold 3, the manufactured hollow bearing materials have l(
Only a linear oil groove continuous in the 1+ direction could be formed.

In view of the above-mentioned problems, this invention improves and develops the conventional manufacturing method of U-shaped hollow bearing cables 4 for continuous casting. An object of the present invention is to provide a method for manufacturing a hollow bearing material by continuous casting, which can continuously manufacture the hollow bearing material.

A method of manufacturing a hollow bearing material with an oil groove using a continuous casting mold according to the present invention includes forming a bottomless cavity by an outer mold and a core, and forming claws protruding into the cavity in the outer mold or the core. By pouring molten metal from one end of a continuous casting mold, cooling it in the continuous casting mold, rotating it in the circumferential direction with at least the surface solidified, and pulling it out while forming circumferential grooves, various A hollow bearing material with an oil groove having a shape of oil 11 is continuously produced.

According to the present invention, it is possible to omit oil groove machining, which was conventionally done in a separate process, and the oil groove has a complex shape such as a spiral shape or a figure 8 shape. The bearing material can also be manufactured extremely easily, reducing manufacturing man-hours and significantly reducing manufacturing costs through mass production.

Hereinafter, the present invention will be explained with reference to illustrated embodiments.

The continuous casting mold 5 used in this invention is composed of a cylindrical outer mold 1 with a T-shaped cross section and a cylindrical +11 mold 2 with an F-shaped cross section. The lower half 1 of the melting furnace 4 penetrates through a hole 5 drilled in the bottom of the melting furnace 4 and protrudes directly below.

Projections 6, 6 are formed on the lower surface of the large diameter of the outer mold 1, and four parts 7, 7 that fit with the projections 6, 6 are formed at the peripheral edge of the hole 5 of the melting furnace 4. , outer mold 1o,) The lower half penetrates the hole 5 and projects directly below, and the protruding piece 6.6 and the recessed parts 7, 7
It is mounted 11'i on the upper part of the bottom plate of the melting furnace 4 by engaging them with each other to prevent relative rotation. In addition, the large diameter part (1111 surface part) of the outer mold 1 has a pouring port 8 which opens into the melting furnace 4.
A plurality of holes 8 and 11 are provided.

In addition, a protruding piece 10° 10 is formed on the side surface of the large diameter portion 9 of the core 2, and the upper end 1 of the large diameter portion of the outer mold 1 is slightly larger than the inner diameter of the small diameter portion, which is the outer diameter of the molded product. A hole 11 with a diameter of At the same time, the protrusions 10, 10 and the recess 1
2 and 12 are installed in the outer mold 1 so as to engage each other and prevent relative rotation. In addition, one or more claws 13.13 are formed in the small diameter portion of the core 2 and project into the cavity. Reference numeral 14.14 is a nozzle that injects cooling water, and reference numeral 15 is a chuck.

This invention has the above configuration. Next, to explain the manufacturing method of the oil groove hollow bearing element, the molten metal 16 in the melting furnace 4 is connected by water head pressure 1: it is poured into the cavity of the casting mold 5 from the pouring port 8.8, and It is pulled out from the lower end of the continuous casting mold 5. At this time, claws 13.15 protrude into the cavity, and oil grooves 1B and 1+3 are formed by the claws 13.13. Immediately, the extracted hollow bearing material 17 with oil grooves is grabbed by the chuck 15, and when pulled out while swinging and rotating at a constant angle in the circumferential direction, the oil grooves 1B, 1B become approximately figure 8-shaped as shown in the figure. The oil grooves 1B, 18. is formed into a spiral shape.

FIGS. 8 and 9 show claws 15 that protrude to the side.
13 is formed on the outer mold 1.
This shows another method of manufacturing the hollow bearing 17 with oil grooves according to
It can be formed on the outer peripheral surface of the oil grooved hollow bearing material 17.

The drawing speed, rotational speed, rotational angle, and rotational direction of the oil groove hollow bearing element 17 by the chuck 15 can be freely controlled.

As described above, according to the present invention, it is possible to form oil grooves of various shapes during RDJ manufacturing, so that it is possible to form oil grooves in various shapes during RDJ manufacturing. It is possible to omit the machining of i'#, and it is also possible to manufacture hollow i1'llll receiving blades very easily, which allows for reduction of manufacturing man-hours and mass production. Therefore, manufacturing costs can be significantly reduced.

[Brief explanation of the drawing]

Figures 1 to 4 show a conventional manufacturing method for hollow bearing materials with oil grooves. Figure 1 is a longitudinal sectional view, Figure 2 is a plan view, and Figures 5 and 4 are The sectional views taken along the line A-A and B-B in the figure, and FIGS. 5 to 9 show the manufacturing method of the oil grooved hollow bearing material according to the present invention, and FIGS. 6 is a plan view of FIG. 5, FIG. 7 is a sectional view taken along the line C--C in FIG. 5, and FIG. 9 is a sectional view taken along the line D--D in FIG. 8. 1. Outer mold, 2. Core, 3. Continuous casting mold, 4.
・Melting furnace, 5...hole, 6...protrusion, 7...recess, 8...
Pouring spout, 9...large diameter part, 10...protrusion, 11...hole, 1
2... recess, 13... pawl, 14... nozzle, 15... chuck, 16... molten metal, 17... hollow bearing material with oil groove, 18 pa... oil groove.

Claims (1)

[Claims] Molten metal is poured into the continuous casting mold from one end of the continuous casting mold, in which a bottomless cavity is formed by the outer mold and the core, and claws are formed on the outer mold or the core to protrude into the cavity. A method for manufacturing a hollow bearing material with oil grooves by continuous casting, characterized by cooling the material at a temperature of 100 mL, rotating it in the circumferential direction in a state where at least the surface is solidified, and drawing it out while forming grooves in the circumferential direction.